Method of producing press-copies.



'C. W. JEAN.

METHOD OF PRODUCING PRESS COPIES.

APPLICATION FILED JAN. 22. l9l7.

Patented Oct. 15, 1918.

LQL'YL warren. snares Parana snares.

CHARLES W. JEAN, OF NEW YORK, N. Y.

METHOD OF PRODUCING PRESS-COPIES.

Specification of Letters Patent.

Patented @ct. 15, 1918.

Application filed January 22. 1917. Serial No. 143,800.

making oif-set copies. ordinarily known as press copies, of letters or like documents whereas each letter is copied upon a continually moving sheetor web of tissue or like copying paper. which web of paper is held in constantly taut condition from the time it leaves the roll until it is delivered to the shear in dry and smooth condition carrying the impregnated or off-set copies thereon. said shear being provided for severing the web into such sections as may be necessary to properly separate the copies.

hile in the practice of the present process mechanical means are ordinarily employed for carrying forward the several steps of the process. the particular mechanical means are immaterial to the present invention, one being shown in application Serial Xo. 29%11. filed May 20. 1915, and the mechanical disclosure thereof reproduced herein as a means for carrying into effect the present method.

In the drawing. taken without change from said application No. 29414:

Figure 1 is a sectional view showing the path of movementof the web of copy paper, and the means for maintaining it in taut position. v

Fig. 2 is a view of such mechanical structure in side elevation showing the means for moving the several parts.

Fig. 3 is a fragmentary detail view of the tension mechanism.

Like characters of reference designate corresponding parts throughout the several views.

In employing the mechanical structure shown in the drawings. for carrying into effect the present method, a roll of tissue or copy paper is maintained at carried upon the general frame 11 of the structure. The roll 10 is mounted upon a beam 12 having a tension device 13 resisting rotation'of' the beam 12 and web 10. 7

From the beam 12. the paper strip 10 passes between ino'istening rolls 1:: and 15, one of-which. as the roller l-l.'moves in the trough so that the web 10 "passing between such rollers is subjected to a moistening effect. v

To properly position the web for receiving the documents and also for the purpose of extracting excess moisture therefrom, the said web is carried over a roller 16, and between such roller 16 and the compression roller 17.

Conveniently located above the sheet 10 after passing over the roller 16 is a table 18 upon which the letters or other documents to be copied are placed. and from which they are fed upon the sheet 10 as it passes between the rollers 19 and 20. which rollers not only serve the purpose of assisting the advancing of the traveling sheet 10, but also exert compression upon the documents placed on said sheet so that the sheet being moistened. the printing. writ-ing or' other matter to be copied appearing upon such sheets is off-set upon such moistened sheet which sheet it impregnates in the usual Wellknown manner with such copied matter.

After passing between the rollers 19 and 20 the said sheet 10 passes over a heated roller 21 maintained in heated condition in any approved manner, as, for instance, by

the employment of the fluid fuel burner 22 shown at Fig. 1 supplied with a fluid fuel through and by any convenient conduit as shown at 23 in Fig. 2. An idle roller 24 is employed to properly smooth out and position the sheet 10 upon the heated roller 21, and the document copied after passing between such rollers 21 and 2& is discharged from the copied sheet in any approved manner as by being manually removed or falling out by gravity. A second idle roller 25 is employed so that the sheet 10 received upon the heated roller 21 in a moistened condition is carried about as large a portion of the circumferential travel of said roller as -convenient so that the heat of said roller may dry said sheet before it is carried farther onits travel.

After passing over the idler 25 the sheet 10 is carried between feed rollers 26 and27 conveniently close to which is located the shear 28 operated in an approved manner for severing sections of the sheet carrying the offset and impregnated copy.

\ thereby v in taut condition,

pressure,

The peripheries of the several rollers 14, 16, 19,21 and 26 are driven by approved transmission mechanism as shown at Fig. 2 or otherwise, so that all the said peripheries travel coincidentally, thereby maintaining the sheet in taut condition without subjecting said sheet to pullin stress caused by the periphery of one r0 lertraveling faster than the periphery of another, endangering the severance of the sheet at undeslred points. The entire mechanism is driven in any approved manner, a motor 29 being shown, but it being understood that the application ofmotor force is immaterial to the present invention. r

The machine shown, therefore, accom: plishes the carrying forward of the present method in that the parts being rotated by an approved means as the motor shown, the sheet 10 travels from the beam 12 between the moistening rollers, between the extracting rollers, and then forms a plane surface from such extracting rollers to the heating surface located between which are the compresslon'rollers l9 and 20. The document is applied to the sheet'at this point, and be mg earned between the compression rollers 19 and 20 off-setsits-matter in the usual wellknown manner. The sheet being maintamed in traveling constantly in a smooth condition about the heated roller is dried in such smooth condition and is delivered to the shear in -such dryand smooth condition for severance into the necessary sections for fillng or other use in the usual well-known manner.

What I claim is:

1. The method of producing a dry ofi-set copy of a document consisting in employing a traveling sheet of copy paper maintained applying moisture to said sheet, positioning the document upon the sheet, subject ng the sheet and document to drylng the sheet by contact with a heated'surface traveling coincidentally with the sheet, and finally severing the section of the sheet impregnated with the off-set copy while yet 1 na1nta1ning said traveling and taut condltlon of the remainingsheet.

2. The method of producng a dry off-set copy of a document consisting in employing a traveling sheet of copy paper maintained in taut conditlon, applying moisture to said sheet, pos 1t1o n1ng the document upon the sheet, sub ect ng the sheet and document to pressure, drylng the sheet by contact with a heated surface traveling coincidentally with the sheet, and delivering the sheet driedby such contact toproper position for severing in sections.

3. The method of'producing a dry off-set copy of a document COIlSiSting. in employing a traveling sheet .of moistened copy paper maintained in taut condition, positioning.

the document upon the sheet, subjecting the sheet and document to pressure, drying the in taut position, applying moisture to said sheet, positioning the document upon the sheet, subjecting the sheet and document to pressure, and drying the sheet in contact y with a Heated surface, and finally severing the sections of the sheet impregnated with the off-set copies while yet maintaining said traveling and taut condition of the remaining sheet.

5. The method of producing dry off-set copies of documents consisting in employing a traveling sheet of copy paper, applying moisture to said sheet, placing the documents on the sheet, subjecting the sheet and documents to pressure, drying the sheet by contact with a heated surface traveling coincidentally with the sheet, and finally severing the sections of the sheet impregnated Withuthfi off-set copies.

6. The method of producing a dry off-set copy of a document consisting in employing a traveling sheetof copy paper maintained in taut condition, applying moisture to the traveling sheet, applying the document to be copied to the sheet, sub ecting the document to pressure to bring it into intimate engagement with the sheet, removing the document from the sheet, dryin the sheet by contact with a traveling heate surface, releasing the end of the sheet from taut condition, and severing the released end.

7. The method of producing dry off-set copies of a document consisting in employing a traveling sheet of semi-transparent paper, maintainin v the traveling sheet in taut condition, applying moisture to the sheet, impressing the document to be copied upon the moistened sheet, removing the document from the sheet, drying the sheet by contact with a heated surface, releasing the forward end of the traveling sheet from taut condi tion, and severin the released portion.

In testimony whereof I aflix my signature.

' CHARLES W. JEAN. 

